ISSN:
1572-8935
Keywords:
Conjugated conducting polymer
;
FeCl3-doped poly(3-alkylthiophene)s
;
Aggregation
;
Thermal undoping
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract For neutral and FeCl3-doped poly(3-octylthiophene) (P3OT), measurements of 57Fe Mössbauer spectroscopy, conductivity, thermogravimetric analysis, differential scanning calorimetry and dynamic mechanical analysis are performed in order to understand the thermal undoping behavior. It is found that the counter anion for the doped P3OT is FeCl4. At the doping level 0.33, its glass transition temperature (Tg) shifts from 11.2 °C at the neutral state to 137 °C. During the heat treatment, the aggregation of the dopant occurs between 65 to 150 °C (centered at 99 °C) and the decomposition of dopant anions occurs between 150 to 236 °C (centered at 188 °C). The aggregation of the dopant anion in the glass transition period is resulted from the increased ring distortion in the subchains, which leads to a slow decrease in conductivity. As the dopant anions decomposes, the conductivity drops sharply.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10965-006-0032-0
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